 /*******************************************************************************
  * Copyright (c) 2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.texteditor;

 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.widgets.Button;

 import org.eclipse.core.runtime.Assert;

 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.resource.JFaceResources;


 /**
  * Utility class to simplify access to some SWT resources.
  *
  * @since 3.3
  */
 public class SWTUtil {

     /**
      * Returns a width hint for the given button.
      *
      * @param button the button
      * @return the width hint for the button
      */
     public static int getButtonWidthHint(Button button) {
         button.setFont(JFaceResources.getDialogFont());
         PixelConverter converter= new PixelConverter(button);
         int widthHint= converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
         return Math.max(widthHint, button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).x);
     }

     /**
      * Sets width and height hint for the button control.
      * <b>Note:</b> This is a NOP if the button's layout data is not
      * an instance of <code>GridData</code>.
      *
      * @param button the button for which to set the dimension hint
      */
     public static void setButtonDimensionHint(Button button) {
         Assert.isNotNull(button);
         Object gd= button.getLayoutData();
         if (gd instanceof GridData) {
             ((GridData)gd).widthHint= getButtonWidthHint(button);
             ((GridData)gd).horizontalAlignment = GridData.FILL;
         }
     }
 }

